Stenciling compound.



sn'rns PATENT oration.

GEORGE s'. warm, or NEw'Yoax, N. Y., ASSIGNOB TO 1'. W. Devon AND 0. T.

'RAYNoLns COMPANY, or NEW YORK, N. Y.

STENCILING comroUNn.

953, 1 10. 1N0 Drawing.

Specification of Letters Patent. Application filed July 27,

Patented Mar. 29, 1910. 1809. Serial Ho. 509,848.

To all whom it may concern:

Be it'known that I, GEORGE S. VVHrr'rY, a citizen of the United States, and a resident of the boron h of B ooklyn, county of Kings, city. an State of ew York, have invented Compound, which has a marked capacity for belng rendered extremely permanent when applied to the material to be stenciled, of which the following is a full, clear, and exact description.

In compounding my material, I use the following ingredients, or their equivalents, in about the following proportions. I'take say two per cent. of some suitable direct substantive color. These colors are, for the most part, azo-compounds derived from benzidin, or from bases whichare similar to benprefer to first dissolve or out it a ways mo1st or fluid.

bottles,

zidin in their construction. It may beneficially' be a coal-tar color, such as benzo fast scarlet. 'To this I add enou h water to thoroughly dissolve the color an hold it in solution. If the water is not naturally sufficiently alkaline to effect the solution, then I make it sufiiciently so by suitable addition of agents having an alkaline reaction, such as sodium borate, or any other suitable a1- kali,-or even a neutral soa I then add about fifteen per cent. -0 common salt (chlond of sodium), and about twenty five per cent. of formaldehyde, Or any other aldehyde, and finally I add the requisite amount of gummy material, such as arabic, dextrm, gum tragacanth, or the" ike dissolved in water. Some aldeh des are not readily soluble in water. .11 Sue be used, I bythe use of alcohol. I sometimes add a suitable percentage of glycerin, which, owing to its droscopic quality, will keep the material I prepare my stenciling compound for the market either in the form of a aste, in which case it may be marketed in tu es, to be additionally dissolved or thinned with water at the time of use; or in liquid form, put up in or other suitable receptacles.

My new com ound is a plied to the desired surfaceas y a stenciling plate,'with a pen or with a brush. Of course the material will be prepared for the intended use either as a aste, a semi-paste or a liquid. After it has een applied to the desired surface and dried, a wet or damp cloth is applied to the a new and Improved Stenciling reverse side of the fabric or surface, and the work is then thorou hly steamed by ironing with a hot iron. The work isthen allowed I to thoroughly dry, when the. excess of the [stenciling com ound, that is to say, that which has not been taken up by the fabric,

moved by washin Upon final drying, the work will be found to be soft and pliable.

In order that my invention may be better understood, I will state that in making my colors re erred to, because I have found that they work more efliciently than other color ing materials in conjunction with vegetable fiber, such as linen cotton, etc., and my 1nvention is intended for use in conjunction with fabrics made from such fiber. I use formaldehyde or other aldehyde, because it aids when su jected to the heat and steam of the ironing rocess, in conjunction with the salt, in ren ering the colors more fixed than theywould otherwise be, particularly since it revents, or at least laiklgely retards the capl lary actiona of the bers which would tend to spread or disperse the stenciling material or ink from the immediate lines in which it was in the first instance applied. I use the salt because as soon as the heat and steam of the ironing process are applied, the salt dissolves and combining'with the other elements, particularly the formaldehyde, produces an insoluble precipitate on the fabric, which thereafter cannot be removed by washing. The gummy or adhesive material is employed as a means to cause the stenciling compound to adhere. to the surface of the fabric when the latter is reversed durin the steaming operation, because if it ha become dry, it mlfig'ht, during the fiexure of the fabric, drop 0 .in part at least. The glycerin, as above stated, if used, is added simply because of its hygroscop c qualities, sinceit'prevents the paste or liquid compound from evaporatmg or drying up.

I refer to washin away any excess of the stenciling compoun after it has been rendered insoluble bp the heat and steam of the ironing process, ecause'there is apt to remain upon the surface of the fabric a deposlt composed of the residual of theadhesive material and ossibly ,some refuse of the salt, and in order that the character of the fabric may not be changed and its natural but rests upon the surface thereof, may be re-,

new compound, I use the direct substantive softness and smoothness. preserved, itis desirable to remove this deposit-if it occurs.

Although I glrefer" the pro ingredients to e substantial y above,-iyet they from and still sati ortions of th as set forth may be somewhat departed s factory results secured;

direct substantive coloring matter, an aidehyde, salt and adhesive material.

2. A stenciling compound comp direct substantive coloring matter, an aldehyde, salt, glycerin, and adhesive material. In testimony whereof I have signed my particularly the amount of the aldehyde name to this specification in the presence of may ary, considerably, all the wa from two subscribing witnesses. ten to forty per cent. being usable, epend- GEORGE S. WHITTY. 1o ing on the special kind employed. Witnesses:

I claim: a PHILLIPS Anson,

1. A stenciling compound composed of J. J. KENHEDI.

used of 1.5 

